2016 new design gas steam heating boiler Agent furnace

Boiler vs. Furnace Energy Efficiency | Constellation

Nov 11 2016 · KompareIt says that steam boilers running on oil have a minimum AFUE of 82%. A steam boiler running on gas meanwhile would have a minimum of 80%. Hot water boilers have a minimum of 82% for gas models and 84% for models that run on oil. Energy.gov says vs.

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